bn:00061687n
Noun Concept
Categories: All articles needing additional references, Calendars
EN
perpetual calendar  perpetual calendars
EN
A chart or mechanical device that indicates the days of the week corresponding to any given date over a long period of years WordNet 3.0
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EN
A chart or mechanical device that indicates the days of the week corresponding to any given date over a long period of years WordNet 3.0 & Open English WordNet
A perpetual calendar is a calendar valid for many years, usually designed to look up the day of the week for a given date in the past or future. Wikipedia
Calendar valid for many years Wikidata
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